Gas milage & speed booster???

[jim123]

Maybe it is because I am runniing the A/C all the time ( South Texas). But my milage seems to have dropped since I put in the C/C with speed booster?? Anyone else noticed this are is it me???

[jetfuel]

...what's your mpg now?

jetfuel

[Godfather]

Be nice jet............

[jim123]

Around 35 to 39mpg most days. That is with a 40 mile commute most of it on the Hwy.....

[jetfuel]

...not bad at all...a/c on and extreme hot air will rob performance and increase fuel consumption... other condition...check tire pressure...air filter...and check for non-precious metal on your right foot...

jetfuel

[SuperGeek]

Depending on the speed of your 40 mile commute, 35-39 with AC is about right. I'd say that's average for 70mph steady, or if you vary the amount of pressure on the gas pedal and/or have to brake more than a few times on the trip. Even just letting up on the gas pedal so the engine braking kicks in will impact MPGs - not because it consumes gas, but the friction's wasting kinetic energy that you just spent gas to accumulate. It's not a huge amount at the higher speeds but it'll add up to a few MPG.

Drive steady, 50 feet or more behind people, let them pass you, and you might just get 45-50 MPG doing 55mph.

[jonnysan]

Even just letting up on the gas pedal so the engine braking kicks in will impact MPGs - not because it consumes gas, but the friction's wasting kinetic energy that you just spent gas to accumulate.

This is an interesting theory. Please explain ....

[John_H]

I thought it was common knowledge.